453
VPN instance/VLAN ID/Inline ID: -/-/-
Protocol: ICMP(1)
Inbound interface: GigabitEthernet2/0/1
Responder:
Source IP/port: 20.1.1.1/1025
Destination IP/port: 10.1.1.1/0
DS-Lite tunnel peer: -
VPN instance/VLAN ID/Inline ID: -/-/-
Protocol: ICMP(1)
Inbound interface: GigabitEthernet2/0/2
State: ICMP_REPLY
Application: OTHER
Start time: 2014-03-13 08:52:59 TTL: 27s
Initiator->Responder: 4 packets 240 bytes
Responder->Initiator: 4 packets 240 bytes
Total sessions found: 1
Providing FTP service from an IPv6 network to the IPv4
Internet
Network requirements
As shown in Figure 162, a company upgrades the network to IPv6, and it has an IPv4 address
10.1.1.1.
To allow the IPv6 FTP server to provide FTP services to IPv4 hosts, configure the following AFT
policies on the router:
• Map the IPv6 FTP server's IPv6 address and TCP port number to the company's IPv4 address
and TCP port number.
• Configure a NAT64 prefix to translate source IPv4 addresses of IPv4 packets to source IPv6
addresses.
Figure 162 Network diagram
Configuration procedure
# Specify IP addresses for the interfaces on the router. (Details not shown.)
# Map IPv4 address 10.1.1.1 with TCP port 21 to IPv6 address 2013::102 with TCP port 21 for the
IPv6 internal FTP server.
<Router> system-view
[Router] aft v6server protocol tcp 10.1.1.1 21 2013::102 21
# Configure the router to use NAT64 prefix 2012:: 96 to translate source addresses of IPv4 packets.
[Router] aft prefix-nat64 2012:: 96
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